From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zhilong Liu Subject: [PATCH v2] mdadm/grow: adding a test to ensure resize was required Date: Wed, 11 Oct 2017 16:53:12 +0800 Message-ID: <1507711992-11548-1-git-send-email-zlliu@suse.com> References: <1507537274-29350-2-git-send-email-zlliu@suse.com> Return-path: In-Reply-To: <1507537274-29350-2-git-send-email-zlliu@suse.com> Sender: linux-raid-owner@vger.kernel.org To: Jes.Sorensen@gmail.com Cc: linux-raid@vger.kernel.org, Zhilong Liu List-Id: linux-raid.ids To fix the commit: 4b74a905a67e (mdadm/grow: Component size must be larger than chunk size) array.level > 1 : against the raids which chunk_size is meaningful. s->size > 0 : ensure that changing component size has required. array.chunk_size / 1024 > s->size : ensure component size should be always >= current chunk_size when requires resize, otherwise, mddev->pers->resize would be set mddev->dev_sectors as '0'. Reported-by: Tomasz Majchrzak Suggested-by: NeilBrown Signed-off-by: Zhilong Liu --- v1: [PATCH 1/3] mdadm/Grow: fix the broken raid level conversion changes: correct the test 's->level == UnSet' as 's->size > 0' Grow.c | 1 + 1 file changed, 1 insertion(+) diff --git a/Grow.c b/Grow.c index 4d79d83..8c2d50c 100644 --- a/Grow.c +++ b/Grow.c @@ -1810,6 +1810,7 @@ int Grow_reshape(char *devname, int fd, } if (array.level > 1 && + s->size > 0 && (array.chunk_size / 1024) > (int)s->size) { pr_err("component size must be larger than chunk size.\n"); return 1; -- 2.6.6